/dev/enc@ SES doc?

[John]

----- Alan Somers's Original Message -----
> The ses(4) man page describes the ioctls supported by the /dev/sesX nodes.
> The /dev/enc at ... nodes, however, are simply aliases for /dev/da* nodes

   I've been poking around in the code and am probably missing
something obvious.

   I have 3 shelves, dual expanders each, 4 cables from a pair
of LSI 9300-16e cards. I have one disk in each shelf, bay 1
in the 1st shelf, bay 2 in the 2nd, bay 3 in the 3rd. One drive
shows up on each cable/channel:

WBN06J1R0000E8283APS - ses1-da0   ses9-da10 ses3-da4 ses7-da6
WBN0414K0000E81627LM - ses11-da11 ses2-da2  ses5-da5 ses8-da8
WBN05GME0000E8280DY5 - ses0-da1   ses4-da3  ses6-da7 ses10-da9

   And the readout of /dev/enc@* (trailing ses annotation added by hand):

# find /dev/enc@* -name 'da*'
/dev/enc at n500304801f25c63d/type at 0/slot at 3/elmdesc at Slot02/da3 (ses4)
/dev/enc at n500304801f25c6bd/type at 0/slot at 3/elmdesc at Slot02/da1 (ses0)
/dev/enc at n500304801f25c73d/type at 0/slot at 1/elmdesc at Slot00/da4 (ses3)
/dev/enc at n500304801f25c7bd/type at 0/slot at 1/elmdesc at Slot00/da0 (ses1)
/dev/enc at n500304801f25c83d/type at 0/slot at 2/elmdesc at Slot01/da5 (ses5)
/dev/enc at n500304801f25c8bd/type at 0/slot at 2/elmdesc at Slot01/da2 (ses2)

   The 1st 6 ses units are shown - the 2nd 6 ses units are missing (ses6 -> ses11).

   I think the following represents the issue, not sure how to fix it?

# for i in /dev/ses*; do
     camcontrol smpphylist $i 2>/dev/null | grep ses
  done | awk '{print $2;}'
0x500304801f25c6bd
0x500304801f25c7bd
0x500304801f25c6bd
0x500304801f25c8bd
0x500304801f25c8bd
0x500304801f25c73d
0x500304801f25c63d
0x500304801f25c83d
0x500304801f25c63d
0x500304801f25c73d
0x500304801f25c83d
0x500304801f25c7bd
# for i in /dev/ses*; do
     camcontrol smpphylist $i 2>/dev/null | grep ses
  done | awk '{print $2;}' | sort -u
0x500304801f25c63d
0x500304801f25c6bd
0x500304801f25c73d
0x500304801f25c7bd
0x500304801f25c83d
0x500304801f25c8bd

   The ses unit adds a level of uniqueness not provided by just the logical identifier?

   Thoughts?

Thanks,
John

> On Fri, Apr 13, 2018 at 9:07 AM, John <jwd at freebsd.org> wrote:
> 
> > Hi Folks,
> >
> >    Just curious...
> >
> >    Is there any doc for the /dev/enc at .... entries that map
> > any attached SES enabled storage?
> >
> >    cam/scsi/scsi_enc_ses.c does contain a good amount of info.
> >
> > Thanks!
> > John
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